package dao;

import domain.Student;

import java.util.ArrayList;

public class StudentDao {

private ArrayList<Student>list=new ArrayList<>();

    public void addStudent(Student student) {
        list.add(student);
    }

    public ArrayList<Student> find() {
        return list;
    }

    public void delete(String sid) {
        int index = getIndex(sid);
        list.remove(index);
    }

    //
    public int getIndex(String sid){
        for (int i = 0; i < list.size(); i++) {
            Student student = list.get(i);
            if (student.getSid().equals(sid)){
                return i;
            }
        }
        return -1;
    }

    public void update(String sid, Student stu) {
        int index = getIndex(sid);
        list.set(index,stu);

    }
}
